ck_etccdi_27: Canonical ETCCDI 27 Indices

In climatekit: Unified Climate Indices for Temperature, Precipitation, and Drought

Canonical ETCCDI 27 Indices

Description

Returns the 27 canonical Expert Team on Climate Change Detection and Indices (ETCCDI) indices as documented by Alexander et al. (2006) and Zhang et al. (2011), with each row showing the canonical short code, full name, input variable, unit, definition, and the corresponding climatekit function (or NA where the index is not yet implemented).

Usage

ck_etccdi_27()

Details

Use this table to audit coverage, locate the ⁠ck_*⁠ function for a given ETCCDI code, or filter to indices that climatekit currently implements: subset(ck_etccdi_27(), !is.na(ck_function)).

Value

A data frame with one row per canonical ETCCDI index and columns code, name, variable, unit, definition, ck_function, and status.

References

Alexander, L. V. et al. (2006). Global observed changes in daily climate extremes of temperature and precipitation. Journal of Geophysical Research: Atmospheres, 111(D5). \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1029/2005JD006290")}.

Zhang, X. et al. (2011). Indices for monitoring changes in extremes based on daily temperature and precipitation data. Wiley Interdisciplinary Reviews: Climate Change, 2(6), 851-870. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1002/wcc.147")}.

Examples

tab <- ck_etccdi_27()
head(tab)
# Indices currently implemented in climatekit:
subset(tab, !is.na(ck_function))[, c("code", "ck_function")]
# Coverage:
table(tab$status)

climatekit documentation built on May 9, 2026, 5:08 p.m.